problems 0 Newbie Poster

i am having a problem with writing a shell script to back up files for a specific month. the month and year are specified as paramters. so a backup of all the files modified during the specified month have to be made. for example if specify 200406 as my parameter, it should back up files that have been modified during the month of june in year 2004
i know u can use the find -atime -n. but it aonly finds files that were accesed within n days. but i would like to find files for a specific month and back it up. need help please
thanks